describe IncomeTax::Countries::Norway do
  subject(:result) { described_class.new(income: income, income_type: type, tax_year: tax_year) }
  let(:type) { :gross }

  describe "tax year 2015" do

    describe "from gross income of 0" do
      let(:tax_year)     { 2015                                      }
      let(:income)       { 0                                         }
      its(:rate)         { should be == Rational(0, 1)               }
      its(:gross_income) { should be == 0                            }
      its(:net_income)   { should be == 0                            }
      its(:taxes)        { should be == 0                            }
    end

    describe "from gross income of 1000" do
      let(:tax_year)     { 2015                                      }
      let(:income)       { 1000                                      }
      its(:rate)         { should be == Rational(0, 1)               }
      its(:gross_income) { should be == 1000                         }
      its(:net_income)   { should be == 1000                         }
      its(:taxes)        { should be == 0                            }
    end

    describe "from gross income of 10000" do
      let(:tax_year)     { 2015                                      }
      let(:income)       { 10000                                     }
      its(:rate)         { should be == Rational(0, 1)               }
      its(:gross_income) { should be == 10000                        }
      its(:net_income)   { should be == 10000                        }
      its(:taxes)        { should be == 0                            }
    end

    describe "from gross income of 100000" do
      let(:tax_year)     { 2015                                      }
      let(:income)       { 100000                                    }
      its(:rate)         { should be == Rational(13, 298)            }
      its(:gross_income) { should be == 100000                       }
      its(:net_income)   { should be == "95637.6".to_d               }
      its(:taxes)        { should be == "4362.4".to_d                }
    end

    describe "from gross income of 100000000" do
      let(:tax_year)     { 2015                                      }
      let(:income)       { 100000000                                 }
      its(:rate)         { should be == Rational(91, 228)            }
      its(:gross_income) { should be == 100000000                    }
      its(:net_income)   { should be == "60086964.6".to_d            }
      its(:taxes)        { should be == "39913035.4".to_d            }
    end

    describe "from net income of 0" do
      let(:type)         { :net                                      }
      let(:tax_year)     { 2015                                      }
      let(:income)       { 0                                         }
      its(:rate)         { should be == Rational(0, 1)               }
      its(:gross_income) { should be == 0                            }
      its(:net_income)   { should be == 0                            }
      its(:taxes)        { should be == 0                            }
    end

    describe "from net income of 1000" do
      let(:type)         { :net                                      }
      let(:tax_year)     { 2015                                      }
      let(:income)       { 1000                                      }
      its(:rate)         { should be == Rational(0, 1)               }
      its(:gross_income) { should be == 1000                         }
      its(:net_income)   { should be == 1000                         }
      its(:taxes)        { should be == 0                            }
    end

    describe "from net income of 10000" do
      let(:type)         { :net                                      }
      let(:tax_year)     { 2015                                      }
      let(:income)       { 10000                                     }
      its(:rate)         { should be == Rational(0, 1)               }
      its(:gross_income) { should be == 10000                        }
      its(:net_income)   { should be == 10000                        }
      its(:taxes)        { should be == 0                            }
    end

    describe "from net income of 100000" do
      let(:type)         { :net                                      }
      let(:tax_year)     { 2015                                      }
      let(:income)       { 100000                                    }
      its(:rate)         { should be == Rational(65, 1138)           }
      its(:gross_income) { should be == "106058.888888888889".to_d   }
      its(:net_income)   { should be == 100000                       }
      its(:taxes)        { should be == "6058.8888888888889".to_d    }
    end

    describe "from net income of 100000000" do
      let(:type)         { :net                                      }
      let(:tax_year)     { 2015                                      }
      let(:income)       { 100000000                                 }
      its(:rate)         { should be == Rational(151, 378)           }
      its(:gross_income) { should be == "166521725.666666667".to_d   }
      its(:net_income)   { should be == 100000000                    }
      its(:taxes)        { should be == "66521725.6666666667".to_d   }
    end
  end
end
